Functioning like a really dangerous can of spring snakes, the suitcase is simply placed at the side of a road and then remotely triggered by an officer. A long flexible strip filled with hollowed spikes blasts across multiple lanes, and once the target vehicle has crossed it, the strip can be remotely retracted in less than a second to prevent other vehicles from suffering tire damage. There's no word on when the NightHawk will be available, but one thing's for certain: it can't be carry-on friendly. [<a href="http://www.pacsci.com/">PSEMC via Gizmag]